# Pipe Pressure drop calculator vs Control System Calc

The clearest difference is in-app purchases: Control System Calc at none against Pipe Pressure drop calculator's 1. Control System Calc also leads on update cadence (every 5 weeks vs every 3 months). Pipe Pressure drop calculator's advantage is ads (none vs shown) and iOS requirement (13.0 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Pipe Pressure drop calculator sells 1 one-off in-app purchase. Control System Calc asks for nothing beyond the download.

Pipe Pressure drop calculator ships an update every 3 months, Control System Calc every 5 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Pipe Pressure drop calculator | Control System Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/pipe-pressure-drop-calculator/id6752385472/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 61 MB | 10 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ashvin Kevadiya](https://appshunter.io/developer/1756324971) | [洋 刘](https://appshunter.io/developer/6775317751) |

## What reviewers say

### Pipe Pressure drop calculator

[App page](https://appshunter.io/ios/app/pipe-pressure-drop-calculator/id6752385472)

Calculate pipe pressure drop, friction loss, and liquid velocity using the Darcy–Weisbach equation. Supports a wide range of pipe materials, liquids, and diameters for engineers and students.

**Highlights:** Calculate pressure drop, friction loss, and liquid velocity, Supports 76 pipe materials, Supports 58 liquid types, Handles pipe diameters up to 84 inches, Useful for pipeline design and hydraulic systems

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Premium | $7.99 | one-time |


### Control System Calc

[App page](https://appshunter.io/ios/app/control-system-calc/id6791956580)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Pipe Pressure drop calculator free?

Pipe Pressure drop calculator is free to download, with in-app purchases available.

### Is Control System Calc free?

Control System Calc is free to download, with no in-app purchases.

### Do Pipe Pressure drop calculator or Control System Calc have ads?

Control System Calc shows ads; Pipe Pressure drop calculator does not.

### Which is updated more often, Pipe Pressure drop calculator or Control System Calc?

Pipe Pressure drop calculator ships an update every 3 months, and Control System Calc every 5 weeks. Most recently, Pipe Pressure drop calculator was updated on October 30, 2026 and Control System Calc on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*